Calculate the Volume of a Sphere

The formula for the volume of a sphere, V, in terms of its radius, r, is:

V = 4/3πr³

Example

Calculate the volume of the sphere shown below in cm³ to 3 sig. figs.

Answer

Diameter d = 8 cm

Radius r = 8 ÷ 2 = 4 cm

Volume =  4/3πr³ = 4 ÷ 3 x π x 4³  = 268.08.... ≈ 268 cm³ (3 s.f.)

Let's have a go at some questions now. 

If you want to remind yourself of this formula at any point during the activity, just click on the red button and you will be able to see this introduction again.